Results 11 to 20 of about 7,815 (142)

Enzymatic Upgrading of Biomass-Derived Aldoses to Rare Deoxy Ketoses Catalyzed by Transketolase Variants. [PDF]

ChemSusChem
A sustainable, convenient, scalable, one‐step method for the two‐carbon chain elongation of cheap, biomass‐derived pentoses (l‐arabinose, and 2‐deoxy‐d‐ribose) and a hexose (l‐rhamnose) was developed to produce Cn+2 deoxy ketoses (C‐7 and C‐8) using transketolase, an enzyme catalyzing the irreversible transfer of a ketol group from an α‐ketoacid to an ...
Arbia G, Joly M, Nauton L, Leogrande C, Tittmann K, Charmantray F, Hecquet L.   +6 more
europepmc   +2 more sources

Merging Biocatalysis and Chemocatalysis in Flow: State-of-the-Art and Future Directions for Sustainable Synthesis. [PDF]

Angew Chem Int Ed Engl
This review highlights recent advances in integrating biocatalysis and chemocatalysis in continuous flow to create streamlined, sustainable processes. It examines chemo‐enzymatic cascades combining at least one enzymatic and one chemical step, discusses challenges such as enzyme immobilization, leaching, and reactor clogging, and presents solutions ...
Siasiaridis P, Damian M, Mutti FG.
europepmc   +2 more sources

Substrate Induced Movement of the Metal Cofactor between Active and Resting State

Angewandte Chemie, Volume 134, Issue 49, December 5, 2022., 2022
Pyruvate dependent Class II aldolases require a ketoacid to induce a metal shift from resting state to active enzyme. This occurs without alterations in the protein structure and might be a common, but to date overlooked, feature in many metalloproteins. Abstract Regulation of enzyme activity is vital for living organisms.
Stefan R. Marsden, Hein J. Wijma, Michael K. F. Mohr, Inês Justo, Peter‐Leon Hagedoorn, Jesper Laustsen, Cy M. Jeffries, Dmitri Svergun, Luuk Mestrom, Duncan G. G. McMillan, Isabel Bento, Ulf Hanefeld   +11 more
wiley   +2 more sources

Aroma and color development during the production of specialty malts: A review

Comprehensive Reviews in Food Science and Food Safety, Volume 20, Issue 5, Page 4816-4840, September 2021., 2021
Abstract Specialty malts comprise a promising field for innovative approaches concerning their potential in terms of color, aroma, and taste influence on the composition of beer and other beverages. Nevertheless, poor reproducibility of aroma and taste is a recurrent struggle between maltsters, leaving color as a practical parameter for quality control.
Raphael Prado, Martina Gastl, Thomas Becker   +2 more
wiley   +1 more source

The anoxic electrode‐driven fructose catabolism of Pseudomonas putida KT2440

Microbial Biotechnology, Volume 14, Issue 4, Page 1784-1796, July 2021., 2021
A new pathway was uncovered for the fructose metabolism in Pseudomonas putida KT2440 cultivated anaerobically in a bioelectrochemical system. In addition to the typical PTS transporter‐based pathway observed under aerobic condition, fructose was firstly converted to mannose by isomerization and then oxidized to mannonate by the glucose dehydrogenase ...
Anh Vu Nguyen, Bin Lai, Lorenz Adrian, Jens O. Krömer   +3 more
wiley   +1 more source

Crystal structure of a novel homodimeric l‐ribulose 3‐epimerase from Methylomonus sp.

FEBS Open Bio, Volume 11, Issue 6, Page 1621-1637, June 2021., 2021
d‐Allulose has potential as a low‐calorie sweetener which can suppress fat accumulation. The enzymes capable of d‐allulose production have attracted attention. Here, we report the X‐ray structure of a novel l‐ribulose 3‐epimerase from Methylomonas sp.
Hiromi Yoshida, Akihide Yoshihara, Shiro Kato, Susumu Mochizuki, Kazuya Akimitsu, Ken Izumori, Shigehiro Kamitori   +6 more
wiley   +1 more source

Theoretical Insight into the Mediation Mechanism of Water on Favorable Isomerization over Epimerization of Glucose on the Nb₂O₅ Catalyst

, 2023
Over the Nb2O5 catalyst, the reaction mechanisms of both glucose-to-fructose isomerization and glucose-to-mannose epimerization are theoretically studied in both tetrahydrofuran (THF) and aqueous solutions at the GGA-PBE/DNP level.
Yin-Sheng Zhang (14671226), Ting-Hao Liu (8947742), Chang-Wei Hu (1400224), Hua-Qing Yang (1400227), Shuai Fu (131150)   +4 more
core   +2 more sources

Safety evaluation of the food enzyme xylose isomerase from the genetically modified Streptomyces rubiginosus strain DP‐Pzn37

EFSA Journal, Volume 18, Issue 1, January 2020., 2020
Abstract The food enzyme is a d‐xylose aldose‐ketose‐isomerase (EC 5.3.1.5) produced with the genetically modified Streptomyces rubiginosus strain DP‐Pzn37 by Danisco US Inc. Although the production strain contains antibiotic resistance genes, the food enzyme was shown to be free from viable cells of the production organism and its DNA. The food enzyme
EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP), Vittorio Silano, José Manuel Barat Baviera, Claudia Bolognesi, Pier Sandro Cocconcelli, Riccardo Crebelli, David Michael Gott, Konrad Grob, Evgenia Lampi, Alicja Mortensen, Gilles Rivière, Inger‐Lise Steffensen, Christina Tlustos, Henk van Loveren, Laurence Vernis, Holger Zorn, Boet Glandorf, Lieve Herman, Karl‐Heinz Engel, Andrew Smith, Davor Želježić, Margarita Aguilera‐Gómez, Ana Gomes, Natália Kovalkovičová, Yi Liu, Joaquim Maia, Sandra Rainieri, Andrew Chesson   +28 more
wiley   +1 more source

Structural and Functional Characterization of a Novel Family of Cyclophilins, the AquaCyps [PDF]

, 2016
Cyclophilins are ubiquitous cis-trans-prolyl isomerases (PPIases) found in all kingdoms of life. Here, we identify a novel family of cyclophilins, termed AquaCyps, which specifically occurs in marine Alphaproteobacteria, but not in related terrestric ...
Timm Maier, Franz X Schmid, Maier, Timm, Philipp A. M. Schmidpeter (453850), Jakob, Roman P., Johanna R. Koch (2825327), Schmidpeter, Philipp A. M., Franz X. Schmid (1748071), Schmid, Franz X., Philipp A M Schmidpeter, Johanna R Koch, Roman P. Jakob (1637830), Roman P Jakob, Koch, Johanna R., Timm Maier (1637839)   +14 more
core   +2 more sources

Synthesis of specially designed probes to broaden transketolase scope

, 2013
International audienceEfficient, biocompatible, stereospecific strategies were developed to prepare eight probes to assay transketolase (TK) variants with new substrate specificities.
Guérard-Hélaine, Christine, Simon, Grégory, Castillo, José A., Hélaine, Virgil, Hecquet, Laurence, Eljezi, T., Marlière, Philippe, Lemaire, Marielle, Charmantray, Franck, Legeret, Bertrand, Bouzon, M.   +10 more
core   +4 more sources